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August 21st, 2013, 09:41 PM   #1
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Algebra Check UP! WHY am I OFF by sqrt. 2

1/?((1-((x-1)/(x+1))^2 ) )*((1+x)-(1-x))/(1+x)^2

I end up getting = 2/?2x(1+x) ...the answer says it should 1/?x(1+x) ...Yes I did use the variable 2. And the answer was the same as the book... I've tried, but am blocked.

Zen.
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August 22nd, 2013, 12:33 AM   #2
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Re: Algebra Check UP! WHY am I OFF by sqrt. 2









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August 22nd, 2013, 10:34 PM   #3
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Re: Algebra Check UP! WHY am I OFF by sqrt. 2

Solution: 1/(?(1-((x-1)/(x+1)))*((1+x)-(1-x))/(1+x)
=2x/((1+x)?((x+1)-(x-1)/(x+1))
=2x/((x+1)?((x+1)-(x-1)))
=2x/(x+1)?(4x)
=x/(x+1)?x
=?x/(x+1)
this is the right answer.
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August 24th, 2013, 01:16 PM   #4
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Re: Algebra Check UP! WHY am I OFF by sqrt. 2

Okay, I should go to sleep more , I have to brush up on my easy arithmetic, x^2 + 2x + 1 (not x^2 + x + 1)

Thanks.
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August 24th, 2013, 01:20 PM   #5
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Don't be lazy to learn the benefit of LaTeX. Thanks to gelatine1, we could move on to solve such problem.
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